Earlier quoted context omitted.
Please also check curious marc youtube channel where you will find almost all of mentioned adventures!
Ken Sherriff (righto.com) who's chip teardowns are often posted on HN is also a frequent guest on curious marc's channel.
Restoring the Apollo Guidance Computer [video]
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Re: Restoring the Apollo Guidance Computer [video]
#22Interesting: he says that the famous 1202 error may sometimes crash the spacecraft and sometimes land successful in some other cases. And also that it depends on many factors. So, the sane thing to do at that moment, AIUI, was to abort the landing. The Apollo 11 landing was not a tragedy be sheer luck. IIRC Armstrong asked ground control about 1202 and they tell him to ignore it. Ground controllers, probably unknowin…
I recall reading somewhere that the 1202 error was caused by someone switching on the rendezvous radar, in the event of a quick take-off. This caused the computer to continuously seek for a radar lock on the orbiting craft that was not going to occur. Nothing like this happened in the simulator.
Re: Restoring the Apollo Guidance Computer [video]
#23Re: Restoring the Apollo Guidance Computer [video]
#24Oh look, it's the best thing I've ever watched on youtube. Okay, that might be slight hyperbole, but it's solidly in my top ten. One of those where the video documentation has no flourish, and as such doesn't get in the way of how cool the actual project is. Excellent series. If anyone knows of anything even remotely similar, please send it my way.